165433643 has 2 divisors, whose sum is σ = 165433644. Its totient is φ = 165433642.

The previous prime is 165433591. The next prime is 165433669. The reversal of 165433643 is 346334561.

165433643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (346334561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165433643 is a prime.

It is not a weakly prime, because it can be changed into another prime (165433673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82716821 + 82716822.

It is an arithmetic number, because the mean of its divisors is an integer number (82716822).

Almost surely, 2^165433643 is an apocalyptic number.

165433643 is a deficient number, since it is larger than the sum of its proper divisors (1).

165433643 is an equidigital number, since it uses as much as digits as its factorization.

165433643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 35.

The square root of 165433643 is about 12862.1010336570. The cubic root of 165433643 is about 548.9607294602.

The spelling of 165433643 in words is "one hundred sixty-five million, four hundred thirty-three thousand, six hundred forty-three".